Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1980-02-07
1982-06-01
Phillips, Charles E.
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
G01C 906
Patent
active
043320902
ABSTRACT:
An inclinometer which employs a laser light source with a transparent liq and a gas and the laws of optics to reflect the light source to a detector which provides signals for measuring the tilt angle and the direction of tilt from the local horizontal.
REFERENCES:
patent: 3464276 (1969-09-01), Liebert
patent: 3741656 (1973-06-01), Shapiro
Bailey Escar L.
Walker Clifford G.
Deaton James T.
Edelberg Nathan
Gibson Robert P.
Phillips Charles E.
The United States of America as represented by the Secretary of
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